Overall webMethods B2BEDITrading Networks performance got slower when moved from 1cpu to 2cpu so ...

Our overall webMethods performance in Production got much slower when we moved from Netra UltraSPARC IIe 500MHz 1-cpu to E220r UltraSPARCII 450MHz 2-cpu solaris box . Version of B2B/EDI/Trading Networks is 4.0.1 connected to Oracle 8i. 1-cpu box had more than 90% cpu utilization on average but new box has less than 30% cpu utilization on average. Is there any system settings needed to improve the performance by higher cpu utilization on 2-cpu box?